Objects conservators at the National Gallery of Australia are responsible for the care and maintenance of all 3D objects in the Collection, including the sculptures in the Sculpture garden. Unlike other sections in the Conservation department, objects conservators look after objects made from a diverse range of inorganic materials, such as stone, metal, glass and ceramics, as well as organic materials of plant, animal and synthetic origin.
Tim Horn Glass slipper (Ugly Blister) 2001, lead crystal, nickel-plated bronze, Easter egg foil, silicon, Collection of the National gallery of Australia more detail
The work undertaken in this section involves the examination and treatment of objects that are required for Gallery exhibitions, travelling exhibitions and loans to other institutions. Thorough examination, photography and documentation of each object is carried out prior to any treatment, in order to establish a comprehensive record of its condition.
The simplest and most routine treatment that an object requires is cleaning. Surface dust is usually removed with a brush and low vacuum suction. Ingrained dirt in an object’s surface can be cleaned either by using cotton swabs and solvents, or by poulticing. The wide range of materials that 3D works of art are made from precludes the use of standard treatments. There are, however, some treatments that are carried more frequently than others, such as the consolidation of the paint layer on a bark painting, or an adhesive repair on a broken or cracked object.
Even standard treatments need to be carried out with care and vigilance as slight changes in the composition or make up of a material can lead to vastly different results for an identical treatment. In this context the repair of the Ambum stone, a key work in the collection, is a good example of a complex and difficult conservation treatment that was undertaken in 2000.